mail domain name changing when sent

Posted on 2011-10-19
Last Modified: 2012-05-12
Hi all,

    We are having a unique issue with exchange 2007 changing domain names randomly when sending to a group.  Example  I send an email to a group with 20 email addresses that includes  I get an error back from the exchange server stating that doesn't exist and the mail was not delivered, although the 19 others were delivered without problems.  Obviously the name is not in my domain as the address was not  I am not sure why the exchange server is changing one of the email addresses randomly, but it doesn't seem to be stuck to a particular email address either.  It has happened on multiple different addresses but it seems to be always be just one address that is changed out of all of them in the group.

Anyone have any ideas where I can look?

Question by:sstairs
    LVL 4

    Assisted Solution

    You can have anything as an EMAIL alias if you want.
    It might be worth the time to check what addresses are actually on your server.

    maybe copy and paste these commands into exchange management shell and confirm that you do not already have the address in your domain. Press enter a few times after you run it.

    Get-Mailbox -ResultSize “Unlimited” | select name, EmailAddresses | foreach {
    “Name: “+$
    $_.EmailAddresses | foreach {
    “Primary SmtpAddress: $($_.SmtpAddress)”
    } else {
    “SmtpAddress: $($_.SmtpAddress)”
    write-output “”
    } > c:\Addresses.txt
    i got this from  N3ilb’s Weblog, a fun place

    LVL 28

    Assisted Solution

    Before you do anything, first find out if you have  in your Active Directory.

    Places to look
    > Mail enabled contacts
    > person with similar mailbox / alias.

    Another neat trick which you can do, is search the whole AD

    Download adfind

    extract it to desktop

    start > run > cmd
    cd to the directory

    adfind -sc > c:\list.txt

    Check and Edit / modify the user details using AdsiEdit
    start > run > adsiedit.msc
    Navigate to the container listed above.

    Author Comment

    Thanks for the reply.   Neither or shows up as an alternate address for anyone on my server using the command line query or adfind.
    LVL 28

    Expert Comment

    If it's not in AD, check if there are any Transport Rules / Address re-writing Transport rules.

    Author Comment

    There are no transport rules used on the server.
    LVL 28

    Expert Comment

    Open EMC
    Recipient Config

    Check if you have a mail contact for
    right click properties
    Check email addresses.
    See if you applied EAP to the user and does it have in the list of email addresses.

    Accepted Solution

    Issue resolved when we upgraded to Exchange 2010

    Author Closing Comment

    Issue resolved during upgrade.  Experts comments were to the point and valid troubleshooting steps.

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